Final answer:
Composite materials are typically not recyclable in the manufacturing process due to their complex composition.
Step-by-step explanation:
The scrap from the manufacturing process that typically cannot be recycled is c) Composite materials. While materials like aluminum, glass, and paper can be recycled, composite materials are more challenging to recycle due to their complex composition.
Composite materials, such as carbon fiber reinforced polymers, consist of different materials combined together, making it difficult to separate and recycle them efficiently.